145887109 has 8 divisors (see below), whose sum is σ = 148025880. Its totient is φ = 143759616.

The previous prime is 145887103. The next prime is 145887151. The reversal of 145887109 is 901788541.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 756900 + 145130209 = 870^2 + 12047^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145887109 - 2³ = 145887101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145887101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25239 + ... + 30475.

It is an arithmetic number, because the mean of its divisors is an integer number (18503235).

Almost surely, 2^145887109 is an apocalyptic number.

It is an amenable number.

145887109 is a deficient number, since it is larger than the sum of its proper divisors (2138771).

145887109 is an equidigital number, since it uses as much as digits as its factorization.

145887109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5639.

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 145887109 is about 12078.3736074026. The cubic root of 145887109 is about 526.4279902250.

The spelling of 145887109 in words is "one hundred forty-five million, eight hundred eighty-seven thousand, one hundred nine".